Frequencies for first 10,000 rows of mm_aicu variable in natl2016 dataset :

   Admit to |
  Intensive |
 Care Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,948       99.48       99.48
          U |         39        0.39       99.87
          Y |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017